Recebido em 12/11/02; aceito em 19/5/03 CHEMICAL CONTITUENTS OF Alchornea glandulosa (EUPHORBIACEAE). Chemical investigation of the leaves of Alchornea glandulosa (Euphorbiaceae) afforded a mixture of β-sitosterol and stigmasterol, the terpenoid loliolide, the guanidine alkaloid N-1,N-2,N-3-triisopentenylguanidine and the phenolic compound corilagin. The structures of these compounds were elucidated by spectroscopic analysis. The antimicrobial and antiproliferative properties of the crude methanolic extract of the leaves and of fractions from its fractionation, were investigated against a series of bacteria and fungi, as well as against four human cancer cell lines.

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